[] Hadoop linux installation jdk

JDK installation

Set hostname

[root@bigdata111 ~]# vi /etc/hostname

Set machine hosts

[root@bigdata111 ~]# vi /etc/hosts

192.168.1.111 bigdata111
192.168.1.112 bigdata112
192.168.1.113 bigdata113

Create a directory jdk

[root@bigdata111 /]# cd /opt
[root@bigdata111 opt]# ll
总用量 0
drwxr-xr-x. 2 root root 6 3月  26 2015 rh
[root@bigdata111 opt]# mkdir module
[root@bigdata111 opt]# mkdir soft
[root@bigdata111 opt]# ls
module  rh  soft

Upload jdk package

Open winSCP tool, upload java jdk winscp by linux tool to the / opt / soft folder

[root@bigdata111 opt]# cd soft
[root@bigdata111 soft]# ls
jdk-8u144-linux-x64.tar.gz 

Decompression jdk

Unzip the file to the module jdk folder, the command is as follows:

[root@bigdata111 opt]# cd soft
[root@bigdata111 opt]# tar -zxvf jdk-8u144-linux-x64.tar.gz -C /opt/module/
[root@bigdata111 soft]# cd /opt/module
[root@bigdata111 module]# ls
jdk1.8.0_144

Set environment variables jdk

[root@bigdata111 module]# vi /etc/profile

Add jdk environment variable at the end of the file, save and exit:

export JAVA_HOME=/opt/module/jdk1.8.0_144
export PATH=$PATH:$JAVA_HOME/bin

Refresh environment variable

[root@bigdata111 module]# source /etc/profile

Check whether the installation is successful jdk

[root@bigdata111 module]# java -version
java version "1.8.0_144"
Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)